Mathematics
Grade 8
15 min
Find missing angles in triangles and quadrilaterals
Find missing angles in triangles and quadrilaterals
Tutorial Preview
1
Find the missing angle in a triangle with angles 50° and 60°.
2
Find the missing angle in a quadrilateral with angles 100°, 80°, and 90°.
3
An isosceles triangle has a top angle of 40°. Find the base angles.
Sample Practice Questions
Easy
A triangle has angles 30° and 70°. What is the third angle?
0.70°
1.80°
2.90°
3.100°
Easy
A triangle has angles 50° and 50°. What is the third angle?
0.50°
1.80°
2.90°
3.100°
Easy
A quadrilateral has angles 100°, 100°, and 80°. Find the fourth angle.
0.80°
1.90°
2.100°
3.120°
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